/**
 * Version 2.1 -Contributors: "mindinquiring" : filter to exclude any stylesheet
 * other than print. Tested ONLY in IE 8 and FF 3.6. No official support for
 * other browsers, but will TRY to accomodate challenges in other browsers.
 * Example: Print Button: <div id="print_button">Print</div> Print Area : <div
 * class="PrintArea"> ... html ... </div> Javascript : <script>
 * $("div#print_button").click(function(){ $("div.PrintArea").printArea(
 * [OPTIONS] ); }); </script> options are passed as json (json example: {mode:
 * "popup", popClose: false})
 * 
 * {OPTIONS} | [type] | (default), values | Explanation --------- | --------- |
 * ---------------------- | -----------
 * 
 * @mode | [string] | ("iframe"),"popup" | printable window is either iframe or
 *       browser popup
 * @popHt | [number] | (500) | popup window height
 * @popWd | [number] | (400) | popup window width
 * @popX | [number] | (500) | popup window screen X position
 * @popY | [number] | (500) | popup window screen Y position
 * @popTitle | [string] | ('') | popup window title element
 * @popClose | [boolean] | (false),true | popup window close after printing
 * @strict | [boolean] | (undefined),true,false | strict or loose(Transitional)
 *         html 4.01 document standard or undefined to not include at all (only
 *         for popup option)
 */
(function($) {
	var counter = 0;
	var modes = {
		iframe : "iframe",
		popup : "popup"
	};
	var defaults = {
		mode : modes.iframe,
		popHt : 500,
		popWd : 400,
		popX : 200,
		popY : 200,
		popTitle : '',
		popClose : false
	};

	var settings = {};// global settings

	$.fn.printArea = function(options) {
		$.extend(settings, defaults, options);

		counter++;
		var idPrefix = "printArea_";
		$("[id^=" + idPrefix + "]").remove();
		var ele = getFormData($(this));

		settings.id = idPrefix + counter;

		var writeDoc;
		var printWindow;

		switch (settings.mode) {
			case modes.iframe :
				var f = new Iframe();
				writeDoc = f.doc;
				printWindow = f.contentWindow || f;
				break;
			case modes.popup :
				printWindow = new Popup();
				writeDoc = printWindow.doc;
		}

		writeDoc.open();
		writeDoc.write(docType() + "<html>" + getHead() + getBody(ele)
				+ "</html>");
		writeDoc.close();

		printWindow.focus();
		printWindow.print();

		if (settings.mode == modes.popup && settings.popClose)
			printWindow.close();
	}

	function docType() {
		if (settings.mode == modes.iframe || !settings.strict)
			return "";

		var standard = settings.strict == false ? " Trasitional" : "";
		var dtd = settings.strict == false ? "loose" : "strict";

		return '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01' + standard
				+ '//EN" "http://www.w3.org/TR/html4/' + dtd + '.dtd">';
	}

	function getHead() {
		var head = "<head><title>" + settings.popTitle + "</title>";
		$(document).find("link").filter(function() {
					return $(this).attr("rel").toLowerCase() == "stylesheet";
				}).filter(function() { // this filter contributed by
										// "mindinquiring"
					var media = $(this).attr("media");
					return (media.toLowerCase() == "" || media.toLowerCase() == "print")
				}).each(function() {
			head += '<link type="text/css" rel="stylesheet" href="'
					+ $(this).attr("href") + '" >';
		});
		head += "</head>";
		return head;
	}

	function getBody(printElement) {
		return '<body><div class="' + $(printElement).attr("class") + '">'
				+ $(printElement).html() + '</div></body>';
	}

	function getFormData(ele) {
		$("input,select,textarea", ele).each(function() {
					// In cases where radio, checkboxes and select elements are
					// selected and deselected, and the print
					// button is pressed between select/deselect, the print
					// screen shows incorrectly selected elements.
					// To ensure that the correct inputs are selected, when
					// eventually printed, we must inspect each dom element
					var type = $(this).attr("type");
					if (type == "radio" || type == "checkbox") {
						if ($(this).is(":not(:checked)"))
							this.removeAttribute("checked");
						else
							this.setAttribute("checked", true);
					} else if (type == "text")
						this.setAttribute("value", $(this).val());
					else if (type == "select-multiple" || type == "select-one")
						$(this).find("option").each(function() {
									if ($(this).is(":not(:selected)"))
										this.removeAttribute("selected");
									else
										this.setAttribute("selected", true);
								});
					else if (type == "textarea") {
						var v = $(this).attr("value");
						if ($.browser.mozilla) {
							if (this.firstChild)
								this.firstChild.textContent = v;
							else
								this.textContent = v;
						} else
							this.innerHTML = v;
					}
				});
		return ele;
	}

	function Iframe() {
		var frameId = settings.id;
		var iframeStyle = 'border:0;position:absolute;width:0px;height:0px;left:0px;top:0px;';
		var iframe;

		try {
			iframe = document.createElement('iframe');
			document.body.appendChild(iframe);
			$(iframe).attr({
						style : iframeStyle,
						id : frameId,
						src : ""
					});
			iframe.doc = null;
			iframe.doc = iframe.contentDocument
					? iframe.contentDocument
					: (iframe.contentWindow
							? iframe.contentWindow.document
							: iframe.document);
		} catch (e) {
			throw e + ". iframes may not be supported in this browser.";
		}

		if (iframe.doc == null)
			throw "Cannot find document.";

		return iframe;
	}

	function Popup() {
		var windowAttr = "location=yes,statusbar=no,directories=no,menubar=no,titlebar=no,toolbar=no,dependent=no";
		windowAttr += ",width=" + settings.popWd + ",height=" + settings.popHt;
		windowAttr += ",resizable=yes,screenX=" + settings.popX + ",screenY="
				+ settings.popY + ",personalbar=no,scrollbars=no";

		var newWin = window.open("", "_blank", windowAttr);

		newWin.doc = newWin.document;

		return newWin;
	}
})(jQuery);